RM120D - Receiver Adastra - Free user manual and instructions
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| Product Type | PA Receiver / Amplifier |
| Model | RM120D |
| Brand | Adastra |
| Dimensions (W x H x D) | 483 x 88 x 250 mm (19" rack mount, 2U) |
| Weight | Approximately 5.5 kg |
| Power Supply | AC 100-240V, 50/60Hz |
| Power Consumption | 200W max |
| Audio Output Power | 120W RMS per channel (4Ω) |
| Frequency Response | 20Hz - 20kHz ±1dB |
| Inputs | 2x XLR/TRS combo, 2x RCA, 1x 3.5mm aux |
| Outputs | 2x Speakon, 2x binding posts, 1x RCA record out |
| Controls | Volume, Bass, Treble, Input selector, Power switch |
| Indicators | Power LED, Signal/clip LEDs per channel |
| Cooling | Variable speed fan, front-to-back airflow |
| Protection | Short circuit, thermal overload, DC offset |
| Chassis Material | Steel with black powder coat |
| Operating Temperature | 0°C to 40°C |
| Cleaning | Wipe with dry cloth; do not use solvents |
| Safety | Class I equipment; ensure proper grounding |
| Included Accessories | Power cord, rack ears, user manual |
Frequently Asked Questions - RM120D Adastra
How do I connect speakers to the RM120D?
Use the Speakon or binding post outputs. Ensure impedance is 4Ω or higher per channel. Connect positive to red, negative to black.
Can I use the RM120D in a 19-inch rack?
Yes, it is 2U rack mountable. Use the supplied rack ears and support rails for stability.
What is the maximum power output?
120W RMS per channel into 4Ω, or 80W RMS into 8Ω.
The unit powers on but no sound comes out. What should I check?
Verify input source is connected and selected. Check volume is turned up. Ensure speakers are correctly wired and impedance matches. Test with a known working input.
How do I clean the RM120D?
Disconnect power. Use a soft, dry cloth to wipe the exterior. Do not use liquids or abrasive cleaners. Vacuum vents occasionally to prevent dust buildup.
Is there a protection circuit?
Yes, the RM120D includes short circuit, thermal overload, and DC offset protection. If triggered, the unit will shut down automatically. Reset by powering off and correcting the fault.
Can I use banana plugs with the binding posts?
No, the binding posts are designed for bare wire or spade connectors. Banana plugs are not compatible.
What type of input connectors are available?
Two combo XLR/TRS jacks for balanced mics or line signals, two RCA pairs for line-level sources, and a 3.5mm stereo aux input.
Why does the fan run even when idle?
The variable speed fan runs at low speed continuously to ensure airflow. It will increase speed under heavy load or high temperature.
Can I bridge the outputs for more power?
No, the RM120D is not bridgeable. For higher power, consider a larger amplifier.
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